rubocop: Style/FormatStringToken false positive

I came across the following false positive while doing rspec-puppet testing on an sshd module. Sometimes contents of a file can include valid string tokens that look like unannotated Ruby tokens. These are usually wrapped inside a RegEx for testing.

For example, sshd_config can include %u which is a valid username reference.

Expected behavior

The following code shouldn’t be flagged as offensive:

it {
  is_expected.to contain_file('/etc/ssh/sshd_config')
    .with_content(%r{^    ChrootDirectory /var/chroot/%u$})
}

Actual behavior

RuboCop triggers Style/FormatStringToken error:

spec/classes/sshd_spec.rb:3:55: C: Style/FormatStringToken: Prefer annotated tokens (like %<foo>s) over unannotated tokens (like %s).
    .with_content(%r{^    ChrootDirectory /var/chroot/%u$})
                                                      ^^

Steps to reproduce the problem

The snippet above triggers the described offense.

RuboCop version

$ rubocop -V
0.52.0